<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click='showAddCateDialog()'>添加分类</el-button>
        </el-col>
      </el-row>
      <!--表格-->
      <tree-table class='treeTable' :data='cateList' :columns='colums' :selection-type='false' :expand-type='false'
                  :show-index='true' index-text='#' :border='true' :show-row-hover='false'>
        <template slot='isok' slot-scope='scope'>
          <i class='el-icon-success' v-if='scope.row.cat_deleted === false' style='color: lightgreen'></i>
          <i class='el-icon-error' v-else style='color: red'></i>
        </template>
        <template slot='order' slot-scope='scope'>
          <el-tag size='mini' v-if='scope.row.cat_level === 0'>一级</el-tag>
          <el-tag type='success' size='mini' v-else-if='scope.row.cat_level === 1'>二级</el-tag>
          <el-tag type='warning' size='mini' v-else>三级</el-tag>
        </template>
        <template slot='opt'>
          <el-button type='primary' icon='el-icon-edit' size='mini'>编辑</el-button>
          <el-button type='danger' icon='el-icon-delete' size='mini'>删除</el-button>
        </template>
      </tree-table>
      <!--分页-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>

    <!--添加分类的对话框-->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类:">
          <el-cascader
            v-model="selectdKeys"
            :options="parentCateList"
            expand-trigger='hover'
            :props="cascaderProps"
            clearable
            change-on-select
            @change="parentCateChange"></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
      <el-button @click="addCateDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>

export default {
  name: 'Cate',
  data() {
    return {
      cateList: [],
      total: 0,
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      colums: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_pid: 0,
        cat_name: '',
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectdKeys: []
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败!')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        this.$message.error('获取父级分类数据获取')
      }
      this.parentCateList = res.data
    },
    parentCateChange() {
      console.info(this.selectdKeys)
      if (this.selectdKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectdKeys[this.selectdKeys.length - 1]
        this.addCateForm.cat_level = this.selectdKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    async addCate() {
      await this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          this.$message.error('保存失败')
        }
        this.$message.success('添加分类成功')
        await this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectdKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    }
  }
}
</script>

<style scoped lang='less'>
.treeTable {
  margin-top: 15px;
}

.el-cascader {
  width: 100%;
}
</style>
